List of Reborn! episodes (season 6)
Episode list

EP#
Title
Original airdate
141
"Reunion" Transcription: "Saikai" (Japanese: 再会)
July 11, 2009
Shoichi Irie tells Tsuna that in order to open the Vongola Box, the Seven Arcobaleno Seals are needed. In order to obtain the seals, Tsuna needs to overcome the Arcobaleno trials.
Shoichi Irie tells Tsuna that in order to open the Vongola Box, the Seven Arcobaleno Seals are needed. In order to obtain the seals, Tsuna needs to overcome the Arcobaleno trials.
Shoichi Irie tells Tsuna that in order to open the Vongola Box, the Seven Arcobaleno Seals are needed. In order to obtain the seals, Tsuna needs to overcome the Arcobaleno trials.
142
"The Strongest Seven" Transcription: "Saikyō no 7nin" (Japanese: 最強の７人)
July 18, 2009
Back in the past, the 7 Arcobaleno are heading to Namimori to present Tsuna with their trials. Meanwhile, in the future, Irie is telling Tsuna and his friends the details before sending them to the past.
Back in the past, the 7 Arcobaleno are heading to Namimori to present Tsuna with their trials. Meanwhile, in the future, Irie is telling Tsuna and his friends the details before sending them to the past.
Back in the past, the 7 Arcobaleno are heading to Namimori to present Tsuna with their trials. Meanwhile, in the future, Irie is telling Tsuna and his friends the details before sending them to the past.
143
"Trial #1" Transcription: "Dai-ichi no Shiren" (Japanese: 第一の試練)
July 25, 2009
The next day, Tsuna's class receives two transfer students, Monta Hariyama and Himeko Hariyama. During the break, Tsuna is attacked by Lal Mirch of their time period who reveals she will be the observer of the Arcobaleno trials.
The next day, Tsuna's class receives two transfer students, Monta Hariyama and Himeko Hariyama. During the break, Tsuna is attacked by Lal Mirch of their time period who reveals she will be the observer of the Arcobaleno trials.
The next day, Tsuna's class receives two transfer students, Monta Hariyama and Himeko Hariyama. During the break, Tsuna is attacked by Lal Mirch of their time period who reveals she will be the observer of the Arcobaleno trials.
144
"The Arcobaleno Seals" Transcription: "Arukobarēno no Shirushi" (Japanese: アルコバレーノの印)
August 1, 2009
Colonnello continues to overwhelm the two. He is defeated when Gokudera distracts Colonnello for Tsuna to use X-burner on him.
Colonnello continues to overwhelm the two. He is defeated when Gokudera distracts Colonnello for Tsuna to use X-burner on him.
Colonnello continues to overwhelm the two. He is defeated when Gokudera distracts Colonnello for Tsuna to use X-burner on him.
145
"Guardian Showdown! Cloud and Mist" Transcription: "Shugosha Taiketsu! Kumo to Kiri" (Japanese: 守護者対決！雲と霧)
August 8, 2009
Mukuro and Hibari continue their battle and Lal appears announcing this is the second trial. Skull calls his pet octopus to combat but Tsuna easily defeats it.
Mukuro and Hibari continue their battle and Lal appears announcing this is the second trial. Skull calls his pet octopus to combat but Tsuna easily defeats it.
Mukuro and Hibari continue their battle and Lal appears announcing this is the second trial. Skull calls his pet octopus to combat but Tsuna easily defeats it.
146
"Box Weapon Prototype" Transcription: "Bokkusu Heiki Purototaipu" (Japanese: 匣兵器プロトタイプ)
August 15, 2009
Tsuna, Yamamoto and Ryohei are called out to Namimori Middle School where they encounter Mammon, who reveals he has Kyoko hostage.
Tsuna, Yamamoto and Ryohei are called out to Namimori Middle School where they encounter Mammon, who reveals he has Kyoko hostage.
Tsuna, Yamamoto and Ryohei are called out to Namimori Middle School where they encounter Mammon, who reveals he has Kyoko hostage.
147
"Catch the Wind" Transcription: "Kaze o Tsukamaero" (Japanese: 風をつかまえろ)
August 22, 2009
Tsuna returns home after completing the trial. The next day, Tsuna receives a letter from the Arcobaleno, Fong, who is also revealed to be I-pin's Martial Arts sensei.
Tsuna returns home after completing the trial. The next day, Tsuna receives a letter from the Arcobaleno, Fong, who is also revealed to be I-pin's Martial Arts sensei.
Tsuna returns home after completing the trial. The next day, Tsuna receives a letter from the Arcobaleno, Fong, who is also revealed to be I-pin's Martial Arts sensei.
148
"Two Successors of the Sky" Transcription: "Ōzora o Tsugu Futari" (Japanese: 大空を継ぐ二人)
August 29, 2009
Tsuna and his friends discuss who the remaining Arcobaleno are. At that moment, a woman wielding an orange pacifier, named Aria, arrives with Haru and Kyoko and reveals that she will give Tsuna his next trial.
Tsuna and his friends discuss who the remaining Arcobaleno are. At that moment, a woman wielding an orange pacifier, named Aria, arrives with Haru and Kyoko and reveals that she will give Tsuna his next trial.
Tsuna and his friends discuss who the remaining Arcobaleno are. At that moment, a woman wielding an orange pacifier, named Aria, arrives with Haru and Kyoko and reveals that she will give Tsuna his next trial.
149
"Reborn's Trial" Transcription: "Ribōn no Shiren" (Japanese: リボーンの試験)
September 5, 2009
Reborn tells Tsuna and his guardians to assemble at Namimori Island for the next trial. When everyone reaches Namimori Island, the trial is revealed to be a battle of Tsuna's family against Reborn.
Reborn tells Tsuna and his guardians to assemble at Namimori Island for the next trial. When everyone reaches Namimori Island, the trial is revealed to be a battle of Tsuna's family against Reborn.
Reborn tells Tsuna and his guardians to assemble at Namimori Island for the next trial. When everyone reaches Namimori Island, the trial is revealed to be a battle of Tsuna's family against Reborn.
150
"A Path is Closed Off" Transcription: "Tozasareta Michi" (Japanese: 閉ざされた道)
September 12, 2009
While Tsuna's family is recuperating, Verde completes the first stage for his box weapons and decides to seek out the Vongola Rings to help him complete the second stage.
While Tsuna's family is recuperating, Verde completes the first stage for his box weapons and decides to seek out the Vongola Rings to help him complete the second stage.
While Tsuna's family is recuperating, Verde completes the first stage for his box weapons and decides to seek out the Vongola Rings to help him complete the second stage.
151
"Once the Rainbow is Complete" Transcription: "Niji no Sorō Toki" (Japanese: 虹のそろう時)
September 19, 2009
Verde sends out robots to seek the Tsuna's missing two guardians, Lambo and Hibari. Hibari defeats his robot and Fong defeats the robot pursuing Lambo.
Verde sends out robots to seek the Tsuna's missing two guardians, Lambo and Hibari. Hibari defeats his robot and Fong defeats the robot pursuing Lambo.
Verde sends out robots to seek the Tsuna's missing two guardians, Lambo and Hibari. Hibari defeats his robot and Fong defeats the robot pursuing Lambo.
152
"A Boss' Resolve" Transcription: "Bosu no Kakugo" (Japanese: ボスの覚悟)
September 26, 2009
Verde demands Tsuna and his guardians to surrender the Vongola Ring in return for the Arcobaleno's lives. Tsuna refuses to compiles as the rings will be needed for the future battles and declares they shall defeat Verde and save the Arcobaleno.
Verde demands Tsuna and his guardians to surrender the Vongola Ring in return for the Arcobaleno's lives. Tsuna refuses to compiles as the rings will be needed for the future battles and declares they shall defeat Verde and save the Arcobaleno.
Verde demands Tsuna and his guardians to surrender the Vongola Ring in return for the Arcobaleno's lives. Tsuna refuses to compiles as the rings will be needed for the future battles and declares they shall defeat Verde and save the Arcobaleno.
153
"The Final Seal" Transcription: "Saigo no Shirushi" (Japanese: 最後の印)
October 3, 2009
Tsuna, with his Hyper Intuition, feels that Verde is nearby and finds Verde hiding in a nearby island. Verde declares his research is complete after gathering data on the Vongola Rings' Flames and states he will not need the Vongola Rings any more.
Tsuna, with his Hyper Intuition, feels that Verde is nearby and finds Verde hiding in a nearby island. Verde declares his research is complete after gathering data on the Vongola Rings' Flames and states he will not need the Vongola Rings any more.
Tsuna, with his Hyper Intuition, feels that Verde is nearby and finds Verde hiding in a nearby island. Verde declares his research is complete after gathering data on the Vongola Rings' Flames and states he will not need the Vongola Rings any more.

Question: When did season 6 of Reborn! air?
Answer: Season 6 of Reborn! aired between July 11, 2009 and October 3, 2009.